/**
 * \brief Read a single color from the graphical memory
 *
 * Use this function to read a color from the graphical memory of the
 * controller.
 *
 * Limits have to be set prior to calling this function, e.g.:
 * \code
 * ili9341_set_top_left_limit(0, 0);
 * ili9341_set_bottom_right_limit(320, 240);
 * ...
 * \endcode
 *
 * \retval ili9341_color_t The read color pixel
 */
ili9341_color_t ili9341_read_gram(void)
{
	uint8_t red, green, blue;

	ili9341_send_command(ILI9341_CMD_MEMORY_READ);

	/* No interesting data in the first byte, hence read and discard */
	red = ili9341_read_byte();

	red = ili9341_read_byte();
	green = ili9341_read_byte();
	blue = ili9341_read_byte();

	ili9341_deselect_chip();

	return ILI9341_COLOR(red, green, blue);
}
/**
 * \brief Copy pixels from the screen to a pixel buffer
 *
 * Use this function to copy pixels from the display to an internal SRAM buffer.
 *
 * Limits have to be set prior to calling this function, e.g.:
 * \code
 * ili9341_set_top_left_limit(0, 0);
 * ili9341_set_bottom_right_limit(320, 240);
 * ...
 * \endcode
 *
 * \param pixels Pointer to the pixel buffer to read to
 * \param count Number of pixels to read
 */
void ili9341_copy_pixels_from_screen(ili9341_color_t *pixels, uint32_t count)
{
	uint8_t red, green, blue;

	/* Sanity check to make sure that the pixel count is not zero */
	Assert(count > 0);

	ili9341_send_command(ILI9341_CMD_MEMORY_READ);

	/* No interesting data in the first byte, hence read and discard */
	red = ili9341_read_byte();

	while (count--) {
		red = ili9341_read_byte();
		green = ili9341_read_byte();
		blue = ili9341_read_byte();

		*pixels = ILI9341_COLOR(red, green, blue);
		pixels++;
	}

	ili9341_deselect_chip();
}
Beispiel #3
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 * \section compinfo Compilation Info
 * This software was written for the GNU GCC and IAR for AVR.
 * Other compilers may or may not work.
 *
 * \section contactinfo Contact Information
 * For further information, visit
 * <A href="http://www.atmel.com/">Atmel</A>.\n
 */
/*
 * Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
 */
#include <asf.h>

/** Table of primary and secondary display pixel colors */
const ili9341_color_t color_table[] = {
	ILI9341_COLOR(0, 0, 255), ILI9341_COLOR(0, 255, 0),
	ILI9341_COLOR(255, 0, 0), ILI9341_COLOR(255, 255, 0),
	ILI9341_COLOR(255, 0, 255), ILI9341_COLOR(0, 255, 255)
};

/** Number of colors stored in the \ref color_table array */
#define COLOR_TABLE_SIZE          (sizeof(color_table) / sizeof(color_table[0]))

/** Display background color when clearing the display */
#define BG_COLOR                  ILI9341_COLOR(0, 0, 0)

/** Number of pixels for full screen */
#define TOTAL_PIXELS ((uint32_t)ILI9341_DEFAULT_WIDTH * ILI9341_DEFAULT_HEIGHT)

/** Create an array to hold a 40 x 40 bitmap */
ili9341_color_t bitmap[1600];